A) Diffusion of metal ions
B) Oscillation of loose electrons
C) Excitation of free protons
D) Existence of bcc lattice
Correct Answer: B
Solution :
[b] Oscillation of loose electrons Metal luster is due to the metal crystal in which electrons can easily flow like water in the sea. There mobile electrons are simultaneously attracted by the positive ions and hence hold these positive ions together i.e. oscillation of loose electrons.
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